/* Copyright (c) 2010 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.orkut.client.api.samples.greetings.client.services;

/**
 * Helper fxns to implement hash and equals quickly.
 *
 * @author Shishir Birmiwal
 */
public class Objects {
  public static boolean eq(Object obj1, Object obj2) {
    if (obj1 == null && obj2 == null) {
      return true;
    }
    if (obj1 == null || obj2 == null) {
      return false;
    }
    return obj1.equals(obj2);
  }

  public static int hashCodeOf(Object... objs) {
    int hash = 17;
    for (Object obj : objs) {
      hash *= 31;
      if (obj != null) {
        hash += obj.hashCode();
      }
    }
    return hash;
  }
}
